Ground (water) source heat pump unit works by the use of water and ground energy (groundwater, soil or surface water) for cold and heat exchange as a water source heat pump cold source of heat, the ground in the heat to "take" out, supply Indoor heating, at this time can be "heat source"; summer to take out the indoor heat, released into the groundwater, soil or surface water, at this time can be "cold source." With high efficiency and energy saving, environmental protection, safe, reliable, automatic operation and so on. Compared with air source heat pump ground source heat pump, what are the advantages Ground source heat pump compared with air source heat pump, there are many advantages: (1) small temperature fluctuations throughout the year. Winter temperature is higher than the air temperature, summer air temperature is lower than the ground, so the ground source heat pump heating, cooling factor is higher than the air source heat pump, generally higher than 40%, so energy saving and cost savings of about 40%. (2) Winter operation does not require defrosting, reducing frost and defrosting losses. (3) ground source has a better energy storage effect. Ground source heat pump system classification and their respective advantages and disadvantages 1) Groundwaterheatpumps, GWHPs groundwater heat pump system, which is commonly referred to as deep well recharge water source heat pump system. The groundwater is extracted through the construction of a pumping well group and sent to the water source heat pump unit through the second heat exchange or directly to the underground after being extracted heat or releasing heat. Its greatest advantage is very economical, small footprint, but be aware that the following conditions must be met: good water quality; rich water; reliable recharge; standards. 2) (a) Horizontalground-coupledheatpump horizontal buried ground source heat pump system (b) Verticalboreholeground-coupledheatpump vertical buried ground source heat pump system. Both methods (a) and (b) belong to Ground-couple heatpumpsGCHPs (underground coupled heat pump systems), also called buried-pipe ground source heat pump systems. There is another term called Groundheatexchanger underground heat exchanger ground source heat pump system. In this closed system approach, an intermediate medium (usually water or antifreeze water) is used as a heat carrier to circulate the intermediate medium in a closed loop buried in the soil so as to achieve heat exchange with the soil the goal of. For the vertical pipe system, the advantages are: smaller land occupation, pipeline and pump less power, the disadvantage is higher drilling costs; for horizontal pipe system, the advantages are: the installation cost than the vertical buried Pipe system is low, wide range of applications, the user easy to grasp, the disadvantages are: large area, affected by the ground temperature, the pump power consumption. 3) Surface-waterheatpumps, SWHPs surface water heat pump system. By direct extraction or indirect heat exchange, including the use of water, river, lake, reservoir water and sea water as heat pump cold source. Attributed to the water source heat pump. The advantages are: at 10 meters or deeper in the lake, can provide 10 ℃ direct cooling, investment than underground buried pipe system is small, low energy consumption of pumps, high reliability, low maintenance requirements, low operating costs, in the warm Areas, the lake can be used as a heat source, the disadvantages are: In shallow lakes, the coil is easily damaged, due to large changes in water temperature will reduce the unit's efficiency. 4) Standingcolumnwellheatpumps, SCW single well heat transfer wells, that is, single-tube vertical buried ground source heat pump, commonly known in foreign countries as "hot wells." In this way, above the water table with steel sleeve as a sheath, the same diameter and aperture; below the groundwater level is a natural hole, without any cementing facilities. Heat pump unit directly into the hole to enter the water, part of the groundwater level below into the surrounding rock and soil heat transfer, and the rest in the wall and soil heat exchange. The heat-exchanged fluid is withdrawn at the bottom of the hole as a heat pump unit through a return pipe buried to the bottom. This method is mainly used in rock formations, the typical aperture of 150mm, hole depth 450m. The system is suitable for rock and geological areas, rock drilling cost is high in this area, and the direct heat exchange with the rock, greatly improving the heat transfer efficiency, saving drilling, buried pipe costs. Must pay attention to analyze the specific geological conditions, do a good job of insulation, closed, filtered, the actual calculation of heat transfer and other specific work. 5) Hybrid geothermal heat pump system with boiler / cooling tower combined with underground buried pipe: Suitable for buildings with small space and not able to adopt underground heat exchange system separately or inside and outside the district There are a large number of available heat-removing buildings in winter Cooling towers and closed-loop systems combine cooling to save costs; the system proved to be efficient and cost-effective. Its supplementary heat source has water source, solar energy, electric boiler, urban heat network ..., additional heat removal by the cooling tower or water source to solve. The design of the system requires a detailed calculation of the heat and heat removal in each season and the total heat and heat rejection after neutralization to select the heat source and cooling tower. Ground source heat pump and water source heat pump hot and cold source difference: water source heat pump and ground source heat pump are selected from the status of heat sources to define, water source heat pump usually refers to the status of heat from surface water, groundwater, sea water, sewage; ground source heat pump sometimes Also known as ground source heat pump, but groundwater as a low heat source can also be referred to as ground source heat pump. In addition, the water ring heat pump can also be called a water source heat pump. The definition of the point of view is not the same, the name is not the same. The cooling tower cooling system can not be called a water source heat pump, buried underground if the use of drilling wells, the use of well water should become a water source heat pump, or for the ground source heat pump. Ground source heat pump and water source heat pump called the difference: water source heat pump and ground source heat pump was actually called chaos, has introduced the relevant norms of ground source heat pump, which made a clear description of the scope of the call: Ground source heat pump means all use of the earth All heat pumps as cold and heat sources are termed ground-source heat pumps, including soil heat pumps (ground-coupled heat pumps), groundwater heat pumps, surface water heat pumps (including rivers, lakes and seas), and so on. Water source heat pump is a general term, including all with water as a heat source of heat pump, of course, including soil heat pump and water ring heat pump, which is to distinguish between air source heat pump (air-cooled heat pump) and said. Therefore, for large categories, water source heat pumps include ground source heat pumps and water ring heat pumps, as well as some special heat pumps that utilize low heat energy (such as industrial waste water or power plant cooling circulating water). In short, ground-source heat pump is a simple reference to ground-source heat pump, surface water, groundwater, seawater, sewage source heat pump. But now people are accustomed to the ground source heat pump called ground source heat pump, the surface water, groundwater, seawater, sewage source heat pump called water source heat pump.